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首页> 外文期刊>Journal of Agricultural Science >Combination Capacity and Association Among Traits of Grain Yield in Wheat (Triticum aestivum L.): A Review
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Combination Capacity and Association Among Traits of Grain Yield in Wheat (Triticum aestivum L.): A Review

机译：小麦籽粒性状的组合能力和关联性研究述评

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Grain yield is a complex quantitative trait, because its expression is associated to the large number of genes with small effect. In addition, there is interaction among different yield components and environment effect, making difficult the direct selection of genotypes. The most viable alternative for wheat breeding programs, an autogamous plant, is use artificial crosses in order to obtain superior genotypes. Hybridization after use of successive self-fertilizations results in segregating populations, which reveal the genetic variability, especially when the parents are genetically different. Therefore, it is important to know genetic relationships between crosses, which will serve as reference for decision making in the choice of combinations. Therefore, general combining ability (GCA) and specific combining ability (SCA) are used, which facilitate choice of the best parents to compose crossover block. In addition to these parameters, path analysis can be used to determine importance of primary and secondary traits and to guide indirect selection of promising genotypes by means of interest traits.
机译：谷物产量是一个复杂的定量性状，因为其表达与大量基因相关，但影响较小。另外，不同的产量构成要素和环境效应之间存在相互作用，使得直接选择基因型变得困难。小麦育种计划中最可行的替代方法是自生杂种植物，是使用人工杂交以获得优良的基因型。使用连续的自体受精后的杂交导致种群分离，这揭示了遗传变异性，尤其是在父母遗传不同的情况下。因此，了解杂交之间的遗传关系很重要，这将为选择组合时的决策提供参考。因此，使用了一般的结合能力（GCA）和特定的结合能力（SCA），这有助于选择最佳的亲本来组成交联嵌段。除了这些参数外，路径分析还可用于确定主要和次要性状的重要性，并通过兴趣性状来指导有前途的基因型的间接选择。

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